1.

What will be the area of a semi circle whose perimeter is 36 cm

Answer»

Hi ,

Let the radius of a SEMICIRCLE = r cm

Perimeter of the semicircle = π r + 2r

P = 36

r( π + 2 ) = 36

r ( 22/7 + 2 ) = 36

r ( 22 + 14 )/7

(36/7)r = 36

r = ( 36 × 7 )/36

r = 7 cm

Area of the semicircle = π r²/2

A = ( 22/7 ) × 7 × 7/2

A = ( 22 × 7 ) /2

A = 11 × 7

A = 77 cm²

I HOPE this helps you.

: )



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